CN202513934U - Raman fiber amplifier with large gain control range - Google Patents
Raman fiber amplifier with large gain control range Download PDFInfo
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- CN202513934U CN202513934U CN2012201085982U CN201220108598U CN202513934U CN 202513934 U CN202513934 U CN 202513934U CN 2012201085982 U CN2012201085982 U CN 2012201085982U CN 201220108598 U CN201220108598 U CN 201220108598U CN 202513934 U CN202513934 U CN 202513934U
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- fiber amplifier
- filter
- raman fiber
- band
- gain control
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Abstract
The utility model discloses a Raman fiber amplifier with a large gain control range. The Raman fiber amplifier with the large gain control range comprises a pump laser group, a pump signal combiner, a control unit, a first photodetector and a second photodetector, wherein a signal output end of the control unit is connected with the pump laser group; a transmitting end of the pump signal combiner is connected with a common end of a non-bandwidth ASE (amplified spontaneous emission) filter; a non-bandwidth ASE output end of the non-bandwidth ASE filter is connected with the first photodetector; a composite light signal output end of the non-bandwidth ASE filter is connected with a common end of a light-splitting coupler; a small end of the light-splitting coupler is connected with an input end of a signal filter; an output end of the signal filter is connected with the second photodetector; and the first photodetector and the second photodetector are connected with the control unit. After adoption of the structure, the Raman fiber amplifier with the large gain control range can effectively improve the detection precision of the non-working bandwidth ASE power, so that the gain control range of the Raman fiber amplifier is expanded.
Description
Technical field
The utility model belongs to the communications field, particularly a kind of Raman Fiber Amplifier with big gain control range.
Background technology
Distributed Raman fiber amplifier be because can improve noise, gain band and ultra wide gain bandwidth flexibly, and adopt Transmission Fibers as advantages such as gain medias, in communication system, be widely used.Distributed Raman fiber amplifier in the past is because input power is smaller, and its working range all in the linear amplification region of small-signal, adopts constant pumping power mode output more.At present because application such as cloud computing, HD video and 3D recreation to bandwidth require increasingly high; Wavelength number in the communication system is also more and more; Thereby the power that gets into Raman Fiber Amplifier also improves many; Make the working range of Raman Fiber Amplifier exceed the linear amplification region of small-signal, the Raman Fiber Amplifier of constant pumping power mode output has in the past satisfied not the demand of system, thereby just requires the gain of Raman Fiber Amplifier is accurately controlled.
In present distributed Raman fiber amplifier, generally (ampllified spontaneous emission: amplified spontaneous emission) power is controlled the gain of Raman Fiber Amplifier through the outer ASE of detection operations bandwidth.In the existing Raman Fiber Amplifier light path design,, on the small end output light path of light splitting coupler, use band pass filter that signal bandwidth of operation and inoperative bandwidth are separated through on the main optical path of Raman Fiber Amplifier, using the light splitting coupler beam split.Survey the ASE power of inoperative bandwidth again through the outer ASE detector of band.The ASE power relative signal power of inoperative bandwidth is much smaller; When particularly the ASE of inoperative bandwidth detection wave-length coverage is smaller,, then can bring extra bigger differential loss to the outer ASE power of bandwidth of operation if use light splitting coupler; If for example adopt 10% light splitting coupler; Then bring the differential loss of 10dB, limited the detection accuracy of the ASE power outside the bandwidth of operation this moment, thereby influence the gain control range of Raman Fiber Amplifier.
Summary of the invention
The purpose of the utility model is exactly to overcome the problem and shortage that prior art exists, and a kind of Raman Fiber Amplifier with big gain control range is provided.
The technical scheme that the utility model adopts is:
A kind of Raman Fiber Amplifier with big gain control range, it includes pump laser group, pump signal wave multiplexer, control unit, first photo-detector, second photo-detector, the outer ASE filter of band, light splitting coupler, traffic filter; Said first photo-detector, second photo-detector link to each other with control unit, and the control unit signal output part connects the pump laser group; The transmission end of said pump signal wave multiplexer links to each other with the common port of the outer ASE filter of band; Be with the outer ASE output of band of outer ASE filter to link to each other with first photo-detector, the composite optical signal output links to each other with the common port of light splitting coupler; The small end of light splitting coupler links to each other with the input of traffic filter; The output of traffic filter links to each other with second photo-detector.
Said traffic filter can adopt band pass filter with the outer ASE filter of band.
The work broadband of said traffic filter is the Raman Fiber Amplifier service band.
The service band of filtering Raman Fiber Amplifier flashlight is adopted in the work broadband of the outer ASE filter of said band.
The utlity model has following advantage and good effect:
The utility model is employed in and directly uses band pass filter on the main optical path of Raman Fiber Amplifier, can effectively improve the detection accuracy of the outer ASE power of Raman Fiber Amplifier bandwidth of operation, thereby improves the gain control range of Raman Fiber Amplifier.
Description of drawings
The Raman Fiber Amplifier structure chart of Fig. 1, the utility model;
The Raman Fiber Amplifier application drawing of Fig. 2, the utility model.
Wherein:
1, DWDM sets of signals; 2, erbium-doped fiber amplifier EDFA;
3, Transmission Fibers; 4, pump signal wave multiplexer;
5, pump laser group; 6, the outer ASE filter of band;
7, light splitting coupler; 8, traffic filter;
9, first photo-detector; 10, second photo-detector;
11, control unit.
Embodiment
Below in conjunction with accompanying drawing and instance the utility model is further specified:
In conjunction with illustrated in figures 1 and 2; The output light of DWDM sets of signals is after erbium-doped fiber amplifier EDFA 2 amplifies; Get into Raman fiber amplifier through Transmission Fibers 3 again; Transmission Fibers 3 links to each other with the common port of pump signal wave multiplexer 4; The output of pump laser group 5 links to each other with the pumping end of pump signal wave multiplexer 4, and the transmission end of pump signal wave multiplexer 4 links to each other with the common port of the outer ASE filter 6 of band, is with outer ASE filter 6 will import light and is divided into outer light signal of band and composite optical signal; Be with outer light signal promptly to be used to control the outer ASE light of band of Raman amplifier gain computing, composite optical signal is promptly with ASE light in interior flashlight, the band and the non-outer ASE light of band that is used for the Raman amplifier gain computing of part.Be with the outer ASE output of band of outer ASE filter 6 to link to each other with first photo-detector 9, the multiplexing optical signal output links to each other with the common port of light splitting coupler 7.We can use the reflection end of the outer ASE filter 6 of band as the outer ASE output of band; This reflection end links to each other with first photo-detector 9; The reflection end of the outer ASE filter 6 of band this moment is the outer ASE output of band that is used to control the Raman amplifier gain computing, and the transmission end of being with outer ASE filter 6 is the composite optical signal output.Be with the transmission end of outer ASE filter 6 to link to each other with the common port of light splitting coupler 7; The big end of light splitting coupler 7 connects the output optical fibre of output Raman Fiber Amplifier; The small end of light splitting coupler 7 links to each other with the input of traffic filter 8, and the output of traffic filter 8 links to each other with second photo-detector 10.Control unit 11 is controlled the gain of raman amplifier through the probe value of first photo-detector 9 and second photo-detector 10.The bandwidth of operation of traffic filter 8 is the Raman Fiber Amplifier service band, and its effect is to be used for effectively suppressing the outer ASE light of Raman Fiber Amplifier bandwidth of operation, and it is more accurate that flashlight is surveyed.
We also can adopt the transmission end of the outer ASE filter 6 of band as the outer ASE output of band; The transmission end that makes the outer ASE filter 6 of band is the outer ASE output of band that is used to control the Raman amplifier gain computing, and the reflection end of being with outer ASE filter 6 is the composite optical signal output.The transmission end of the outer ASE filter 6 of band this moment links to each other with first photo-detector 9, and its reflection end links to each other with the common port of light splitting coupler 7.
Adopt the utility model the foregoing description; On the main optical path of Raman Fiber Amplifier; Utilize a band pass filter that signal is separated by Raman Fiber Amplifier bandwidth of operation and non-Raman Fiber Amplifier bandwidth of operation, reach the effect of control Raman Fiber Amplifier gain through the non-Raman Fiber Amplifier bandwidth of operation of direct detection ASE power.
Though the utility model has at length illustrated and described a relevant certain embodiments reference, those skilled in the art can should be appreciated that, is not deviating from the spirit and scope of the present invention and can make various changes in form with on the details.These change all will fall into the desired protection range of claim of the present invention.
Claims (4)
1. the Raman Fiber Amplifier with big gain control range is characterized in that: include pump laser group (5), pump signal wave multiplexer (4), control unit (11), first photo-detector (9), second photo-detector (10), band outer ASE filter (6), light splitting coupler (7), traffic filter;
Said first photo-detector (9), second photo-detector (10) link to each other with control unit (11), and control unit (11) signal output part connects pump laser group (5);
The transmission end of said pump signal wave multiplexer (4) links to each other with the common port of the outer ASE filter of band (6); Be with the outer ASE output of band of outer ASE filter (6) to link to each other with first photo-detector (9), its composite optical signal output links to each other with the common port of light splitting coupler (7); The small end of light splitting coupler (7) links to each other with the input of traffic filter (8); The output of traffic filter (8) links to each other with second photo-detector (10).
2. a kind of Raman Fiber Amplifier with big gain control range as claimed in claim 1 is characterized in that:
Said traffic filter (8) and the outer ASE filter of band (6) can adopt band pass filter.
3. a kind of Raman Fiber Amplifier with big gain control range according to claim 2 is characterized in that:
The work broadband of said traffic filter (8) is the Raman Fiber Amplifier service band.
4. a kind of Raman Fiber Amplifier with big gain control range according to claim 2 is characterized in that:
The service band of filtering Raman Fiber Amplifier flashlight is adopted in the work broadband of the outer ASE filter (6) of said band.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201085982U CN202513934U (en) | 2012-03-21 | 2012-03-21 | Raman fiber amplifier with large gain control range |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201085982U CN202513934U (en) | 2012-03-21 | 2012-03-21 | Raman fiber amplifier with large gain control range |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202513934U true CN202513934U (en) | 2012-10-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012201085982U Expired - Lifetime CN202513934U (en) | 2012-03-21 | 2012-03-21 | Raman fiber amplifier with large gain control range |
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| CN (1) | CN202513934U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104242036A (en) * | 2014-10-11 | 2014-12-24 | 无锡市中兴光电子技术有限公司 | Raman fiber amplifier and automatic gain control method thereof |
| CN104993872A (en) * | 2015-06-10 | 2015-10-21 | 无锡市中兴光电子技术有限公司 | Raman fiber amplifier gain compensation and transient control method |
| CN110798264A (en) * | 2019-11-08 | 2020-02-14 | 无锡市德科立光电子技术有限公司 | Raman optical fiber amplifier and gain control method thereof |
-
2012
- 2012-03-21 CN CN2012201085982U patent/CN202513934U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104242036A (en) * | 2014-10-11 | 2014-12-24 | 无锡市中兴光电子技术有限公司 | Raman fiber amplifier and automatic gain control method thereof |
| CN104242036B (en) * | 2014-10-11 | 2017-03-15 | 无锡市德科立光电子技术有限公司 | Raman Fiber Amplifier auto gain control method and Raman Fiber Amplifier |
| CN104993872A (en) * | 2015-06-10 | 2015-10-21 | 无锡市中兴光电子技术有限公司 | Raman fiber amplifier gain compensation and transient control method |
| CN104993872B (en) * | 2015-06-10 | 2017-07-07 | 无锡市德科立光电子技术有限公司 | Raman fiber amplifier gain compensation and transient control methods |
| CN110798264A (en) * | 2019-11-08 | 2020-02-14 | 无锡市德科立光电子技术有限公司 | Raman optical fiber amplifier and gain control method thereof |
| CN110798264B (en) * | 2019-11-08 | 2022-09-02 | 无锡市德科立光电子技术股份有限公司 | Raman optical fiber amplifier and gain control method thereof |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121031 |
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| CX01 | Expiry of patent term |